They said the same thing about DVD and VHS, oh, 10 years ago. I remember it well - Maurice Chevalier
Going back to the OT, this topic comes out from time to time and every season.
Movies and many TV shows are made on film, and images exposed on film are high resolution, even Silent Films. TV shows made on NTSC or PAL
videotape of course excluded.
Here's some previous threads about the subject:
How do they make older movies into Blu-ray Discs?
Older movies with outstanding PQ and AQ
Blu-ray transfer of old movies
Old Movies in Blu-ray Format
Old movies in Blu-ray
etc